VINTAGE CONRAD JOHNSON MV75A-1 VACUUM TUBE POWER AMPLIFIER For Sale -
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VINTAGE CONRAD JOHNSON MV75A-1 VACUUM TUBE POWER AMPLIFIER:
$830.00
VINTAGE CONRAD JOHNSON MV75A-1 VACUUM TUBE POWER AMPLIFIER
I bought this item on earlier this year. Subsequently, without doing any more than powering the unit up, I decided that it would suit me better to have a current model in my audio system. What follows is from the previous seller\'s description (with slight changes):
\"AMAZING SOUND EVEN BY TODAY\'S STANDARDS ! THIS VINTAGE UPGRADED \'CONRAD JOHNSON MV75A-1 VACUUM TUBE POWER AMPLIFIER\' IS IN BEAUTIFUL CONDITION ! THIS CONRAD JOHNSON MV75A-1 VACUUM TUBE POWER AMPLIFIER HAS JUST BEEN CLEANED, SERVICED , POWER CABLE UPGRADED , BIASED , AND TESTED ! A-1 WORKING CONDITION ! COSMETICALLY STUNNING ! SLIGHT BLEMISH ON LEFT SIDE FACE PLATE , ONLY NOTICEABLE IF YOUR LOOKING FOR IT , SHOWN IN PICTURE ! \'AMAZING CONRAD JOHNSON CLASSIC SOUND STAGE\' !\"
Since I never hooked the unit up in my system, I cannot attest to the sound. However, conrad-johnson has a long-standing, well-earned reputation, & I believe that the MV75A-1 is a much sought after vintage tube amplifier. There is an additional \"blemish\" besides the one mentioned: a corner of one of the projecting separators on the left output panel is broken off. This is not visible in the photo. Also, I feel obliged to mention that the upgraded power cable is only 4 feet long, which I found to be too short for my setup. Additionally, the power on LED indicator that is shown as glowing in the previous seller\'s photo no longer does so. The 6550 tubes that were included, one of which was broken, appeared of a generic kind that did not impress me. I have replaced them with cryogenically treated, audiophile grade Tung-Sol tubes (see below). (NOTE: the attached photos are my own, not the previous seller\'s.)
What follows is taken from the conrad-johnson vintage products website:
\"conrad-johnson MV75 Vacuum Tube Power Amplifier
(introduced in 1979)
\"An immediate success, and widely acclaimed as a state-of-the-art contender, this power amplifier strongly signaled that conrad-johnson was indeed a serious company. Like the PV1, the MV75 employed metal film resistors and mylar capacitors throughout the circuitry.
\"The MV75 broke new ground in tube amplifier design by featuring a built in bias indicator circuit to simplify bias adjustment for the tube output stage-a task that must be performed whenever output tubes are changed, and periodically as they age. Earlier tube amplifiers required additional test equipment and technical expertise to set the bias for the output stage-a daunting task for many owners. The MV75 included a built in LED bias indicator for each output tube requiring only a screwdriver to accurately set the bias. This arrangement made it a simple matter for owners to keep their amplifiers operating at peak performance. All subsequent conrad-johnson tube amplifiers have included this built in bias indicator.
\"The MV75A upgrade added high-voltage fuses to protect the amplifier from shorted output tubes and upgraded the mylar capacitors to polypropylene. The MV75A-1 upgrade included circuit revisions to reduce the impedance of the regulated power supplies for the voltage amplifier and inverter stages.\"
Features:
\"Copy of the original type 3 Tung-Sol 6550 made in the 1960’s. Triple getter, carbonized screen, and gold plated grid. The current production benchmark of the classic 6550 sold in matched pairs, the Tungsol reissue 6550 tubes have arrived! These are almost an exact copy of the original version and have that beautiful rich, warm clear Tsol sound. Very dynamic and punchy, beautiful stage and imaging!\"Unit will be shipped securely in a modified MV50 box purchased for the purpose from conrad-johnson (the MV75 box being no longer available).
MV75A Owner\'s Manual included.
I bought this item on earlier this year. Subsequently, without doing any more than powering the unit up, I decided that it would suit me better to have a current model in my audio system. What follows is from the previous seller\'s description (with slight changes):
\"AMAZING SOUND EVEN BY TODAY\'S STANDARDS ! THIS VINTAGE UPGRADED \'CONRAD JOHNSON MV75A-1 VACUUM TUBE POWER AMPLIFIER\' IS IN BEAUTIFUL CONDITION ! THIS CONRAD JOHNSON MV75A-1 VACUUM TUBE POWER AMPLIFIER HAS JUST BEEN CLEANED, SERVICED , POWER CABLE UPGRADED , BIASED , AND TESTED ! A-1 WORKING CONDITION ! COSMETICALLY STUNNING ! SLIGHT BLEMISH ON LEFT SIDE FACE PLATE , ONLY NOTICEABLE IF YOUR LOOKING FOR IT , SHOWN IN PICTURE ! \'AMAZING CONRAD JOHNSON CLASSIC SOUND STAGE\' !\"
Since I never hooked the unit up in my system, I cannot attest to the sound. However, conrad-johnson has a long-standing, well-earned reputation, & I believe that the MV75A-1 is a much sought after vintage tube amplifier. There is an additional \"blemish\" besides the one mentioned: a corner of one of the projecting separators on the left output panel is broken off. This is not visible in the photo. Also, I feel obliged to mention that the upgraded power cable is only 4 feet long, which I found to be too short for my setup. Additionally, the power on LED indicator that is shown as glowing in the previous seller\'s photo no longer does so. The 6550 tubes that were included, one of which was broken, appeared of a generic kind that did not impress me. I have replaced them with cryogenically treated, audiophile grade Tung-Sol tubes (see below). (NOTE: the attached photos are my own, not the previous seller\'s.)
What follows is taken from the conrad-johnson vintage products website:
\"conrad-johnson MV75 Vacuum Tube Power Amplifier
(introduced in 1979)
\"An immediate success, and widely acclaimed as a state-of-the-art contender, this power amplifier strongly signaled that conrad-johnson was indeed a serious company. Like the PV1, the MV75 employed metal film resistors and mylar capacitors throughout the circuitry.
\"The MV75 broke new ground in tube amplifier design by featuring a built in bias indicator circuit to simplify bias adjustment for the tube output stage-a task that must be performed whenever output tubes are changed, and periodically as they age. Earlier tube amplifiers required additional test equipment and technical expertise to set the bias for the output stage-a daunting task for many owners. The MV75 included a built in LED bias indicator for each output tube requiring only a screwdriver to accurately set the bias. This arrangement made it a simple matter for owners to keep their amplifiers operating at peak performance. All subsequent conrad-johnson tube amplifiers have included this built in bias indicator.
\"The MV75A upgrade added high-voltage fuses to protect the amplifier from shorted output tubes and upgraded the mylar capacitors to polypropylene. The MV75A-1 upgrade included circuit revisions to reduce the impedance of the regulated power supplies for the voltage amplifier and inverter stages.\"
Features:
- 4, 8, 16 ohm speaker taps (screw type)
- one pair of inputs
- two plate fuses (MV75A, and MV75A-1)
- mono switch
- power switch
- optional rack mount panel and tube 75 watts per channel, RMS, at 4, 8, or16 ohms with both channels driven from 30Hz to 15kHz with no more than 1% THD or IMD. Monaural 150 watts, RMS, at 4, 8, or 16 ohms from 30 Hz to 15 kHz, with no more than 1% THD or IMD.
- Input Sensitivity: 2.35 Volts RMS to rated power
- Frequency Response: 20Hz to more than 20kHz , +0, -.5dB
- Hum & Noise: 94 dB below 75 15W | 9H | 10D inches
- Weight: 43 lbs.
\"Copy of the original type 3 Tung-Sol 6550 made in the 1960’s. Triple getter, carbonized screen, and gold plated grid. The current production benchmark of the classic 6550 sold in matched pairs, the Tungsol reissue 6550 tubes have arrived! These are almost an exact copy of the original version and have that beautiful rich, warm clear Tsol sound. Very dynamic and punchy, beautiful stage and imaging!\"Unit will be shipped securely in a modified MV50 box purchased for the purpose from conrad-johnson (the MV75 box being no longer available).
MV75A Owner\'s Manual included.
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